Lined end for sanitary cans.



3. CE REGHINO.

LINED END FOR SANITARY CANS.

APPLICATION FILED FEB. 23, 1916.

1 9Q? A Patented; Dec. 5, 19116.

WITNESS. ,v {NgIEIf/ER.

BY m? W 4 ATTORNEY.

JOSEPH CEREGHINO, 0F LOS ANGELES, CALIFORNIA, ASSIGNdEI T0 AMERICAN CAN COMPANY, OF SAN FRANCISCO, CALIFORNIA, A CORPORATION OF NEW JERSEY.

LINED END FOlEt SANITARY CANS.

Specification of Letters JPatent.

Patented Dee. 5,1016.

To all whom it may concern:

Be it known that I, JOSEPH CEREGHINO, a citizen of the United States, residing at Los Angeles, in the county of Los Angeles and State of California, have invented certain new and useful Improvements in Lined Ends for-Sanitary Cans, of which the following is a specification.

The present invention relates to means for sealing cans used for the preservation of food products or other materials, and is, more specifically, an improvement on the can end closure for which Letters Patent No. 1,100,005, was granted to John M. Young on June 16, 1914. The necessity for establishing'and maintaining an absolutely air-tight seam between the body of such a can and the ends thereof is well known, and for this purpose one of the most common methods consists in what is known to the trade as double-seaming, tha is, folding over adjacent flanges of the can body and the end, with some form of packing material interposed therebetween. Various forms of such packing material are known to the art, the most successful of which is a ring liner, of fibrous or other suitable.

material, applied to the groove of the can end flange. In this case, the ring liner, being free to move within the flange, is not so readily torn or mutilated by the necessary handling; which the can end receives subsequent to the application of the liner and prior to the seaming operation, as is the case when the liner or packing material is gummed or glued to the can end flange. However, in the use of ring liners of the ordinary type, in which the liner is of sumcient width to completely fill the groove of the flange within which it lies, it has been found that the inner edge of said liner projects slightly into the interior of the can when the lined end is applied thereto, and is further squeezed thereinto by the seaming operation. A portion of the liner therefore comes into contact with the contents of the can throughout the entire circumference of the seam, and is disintegrated thereby, if said contents include a width of the liner by capillary action, and

by dlsintegrating the, entire liner, destroy the seal and cause a leaky seam. On the other hand, if a liner be used whose interior dlameter is sufliciently greater than the diameter of the inner shoulder of the can end flange to provide a substantial annular clearance space therebetween, that is, a liner sufliciently narrow so that no portion thereof will be squeezed into the interior of the can, difficulty is encountered in keeping the liner correctly centered with respect to the annular groove of the end within which it rests, and it is very apt to become displaced and thereby to cause an imperfect seam.

Moreover, it has been found in practice that such liners, during the curling and interfolding of the flanges during the double seaming operation, are squeezed outwardly to the outer edge of the" seam, and there crumpled or bunched. This results in muti- Figure 1 is an elevation of a sealed can,

part broken away, to show the seam in cross section. Fig. 2 1s a cross section of the end with the improved ring liner applied to the flange thereof. Fig. 3 is a plan view of the inside of the same. Fig. 4 is an enlarged sectional detail of the completed seam, taken at a. narrow part of the ring liner. Fig. 5 is an enlarged sectional detail of the completed seam, taken at one of the wide, or centering points of the ring liner.

In the drawings, the reference numeral 1 designates any suitable form of metallic can g body, and 2 the end cover or can end united thereto by the usual double-seam joint. The can end 2 is formed with a peripheral flange 3 which is bounded by a shoulder 4 and a downwardly turned edge 5 of the can end to form an annular groove 3. Within this groove 3 is placed a ring liner 6, cut from .in the groove of its flange, is applied and paper or other suitable material, and having tacting with said shoulder, whereby the liner 55 an interior diameter greater than that of the shoulder 4 of the flange3 for the greater part of its circumference, thereby leaving clearance spaces 7 between the inner edge of said liner and said shoulder 4. At several points in the inner circumference of the liner" are spacing or centering projections 8 which bear against the shoulder 4 and thus hold the liner in its proper position within the flange groove 3'. These centering points are illustrated in Fig. 3 of the drawings as three in nuncllber, although more may be used if des1re When the end, with the liner 6 lying withseamed to a can body, the greater portion of said liner will occupy the position shown in Fig. 4 0f the drawings. A double seal is thus formedrat the points 7 and 9, Fig. 4: of. the drawings, the metal of the body and ,-,that of the end are held together without the i-nterposition of any packing material, and

form a seal sufficiently tight to prevent any liquid contents of the can reaching the liner 6, and the'outer hermetic seal, formed with said liner 6, will therefore remain perfect for an indefinite length of time.

At the points where the centering projections 8 are formed on the liner, the seam will be as shown in Fig. 5 of the drawings. At

these points, on account of the small amount of material in said centering projections 8, no portion thereof will be squeezed into the interior of the can, the said projections being capable of expanding circumferentially of the flange, instead of being forced radially into the can, by the seaming pressure. A

metal-to-metal seal will therefore be formed Having thus described my invention, what I claim as new and desire to protect by Letters Patent is 1. A can end for the closure of sanitary cans, having an outwardly projecting flange for the seaming of the can endto the flanged end of a can body, and formed with a shoulder for entering a can body and engaging the walls thereof, and a can end liner resting on the shouldered side of said outwardly projecting flange of the can end, and having a portion of its inner edge spaced from said shoulder, and a portion of its inner edge conis held concentric with said shoulder.

2. A can end for the closure of sanitary cans, having an outwardly projecting flange for the seaming of the can end to the flanged end of a can body, and formed with a shoulder for entering a can body and engaging the walls thereof, and a can end liner resting on the shouldered side of said outwardly projecting flange of the can end, and having three or more points arranged around its inner edge, said points contacting with the said shoulder of the can end whereby the said liner is held concentric with said shoul- 3. A can end for the closure of sanitary cans, having an outwardly projecting flange for the seaming of the can end to the flanged end of a can body, and formed with a shoulder for entering a can body and engaging the walls thereof, and a can end liner resting on the shouldered side of said outwardly I projecting flange of the can end, and having an outer edge of unbroken contour, and an inner edge of broken contour, whereby portions of said liner engage the said shoulder of the can end, and the liner is thereby held concentric with the said shoulder.

4. The combination with a can end for the closure of sanitary cans, of a cut ring liner applied thereto and having an outer edge of unbroken contour and an inner edge of broken contour.

5. The combination with a can end for the closure of sanitary cans, having an outwardly projected flange and provided with an interior shoulder portion for entering a can body and engaging the walls thereof, of a liner applied to said flange of the can end, said liner having portions thereof of greater interior diameter than the diameter of the shouldered portion of the can end to provide clearance spaces, and spaced centering projections extended from the inner edge of'the liner and adapted to engage the outer walls of the shouldered portion of the'can end.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

JOSEPH CEREGHINO.

Witnesses:

N. A. ACKER, HARRY-A. TOTTEN. 

